It certainly sounds more like a long-term lease than an actual purchase, sort of like leasing a car instead of buying. The system seems to have changed well before the expiration of the first twenty year agreements, so it's likely no one ever had to address that -- Levitt, certainly, seems to have been very much an "it's dough, let's go" type of guy.
In addition to the caveat on "Caucasians only," Levitt had originally wanted to keep "Hebrews" out as well -- even though he was Jewish himself -- but he realized that he'd be shutting out a large percentage of his potential market, which for the first Levittown was drawn largely from Brooklyn and Queens.
I feel bad for the guy who fought his way across Europe dreaming of a better future and came home to take a job walking thru Levittown measuring the height of shrubs.
Quentin Aanenson was a perfect example."The System seems to have changed -" my guess, however that was "settled" leaned (heavily) in favorite of Levitt not the homeowner. We know how that tends to work.
Agree re the guy who had to measure the hedges - but that's the crazy thing, how mundane so many WWII vets' post-military lives were. From fighter pilot to plumber or insurance salesman, etc. - seems odd, but what's the alternative, they fought for life to return to "normal."
My WWI vet grandfather was a manager in a small diner ('till the depression ended that job) and my WWII vet uncle was a true traveling salesman - (growing up, I thought his sample case was physically attached to him).
Quentin Aanenson was a perfect example.
Fighter ace to insurance salesman.
https://en.m.wikipedia.org/wiki/Quentin_C._Aanenson